US Bridges

SH 103 over Attoyac Bayou

Fair

San Augustine County, Texas · 2.00 MI E of FM 1277 · Structure no. 112030033607039

Built
1965
60 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
640 ft
16 main spans
Daily traffic
5,015
2020 count
Owner
State
State Highway Agency

About this bridge

SH 103 over Attoyac Bayou is a concrete stringer/multi-beam or girder carrying SH 103 over Attoyac Bayou in San Augustine County, Texas. It was built in 1965, so it is 60 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,015 vehicles a day, roughly 16% of them trucks, projected to reach 7,021 by 2040. The structure is 640 ft (195.1 m) long and 35 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSH 103
CrossesAttoyac Bayou
Location2.00 MI E of FM 1277
RouteState Highway 103
CountySan Augustine County
StateTexas
Coordinates31.38329, -94.32318
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.3 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans16
Design loadH 20
Structure length640 ft (195.1 m)
Longest span40 ft (12.2 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,015 (2020)
Projected traffic7,021 by 2040
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 103 over Attoyac Bayou built?

It was built in 1965, making it 60 years old in 2025.

What condition is SH 103 over Attoyac Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does SH 103 over Attoyac Bayou carry?

About 5,015 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is SH 103 over Attoyac Bayou?

The structure is 640 ft (195.1 m) long with a longest span of 40 ft (12.2 m) and a deck 35 ft wide.

Who owns SH 103 over Attoyac Bayou?

It is owned by the State Highway Agency.